%0 Journal Article
%T THE POPULATION DYNAIMCS OF CLAM(RUDITAPES PHILIPPINARUM) AND THE MEASURES FOR ITS PROPAGATION PROTECTION<br>象山港黄墩支港菲律宾蛤仔的种群动态及其繁殖保护措施的探讨
%A Li Mingyun
%A <br>李明云
%A 薛学朗
%A 冯坚
%A 俞峰
%J 生态学报
%D 1989
%I 
%X For the purpose of the rational management and stock propagation, this paper deals with a detailed investigation on the population dynamics of clam (Ruditapes philippinarum) at Huangden area in Xiangshan harbour during the period of July 1984 to October' 1985. The stock composition is mainly made up of two years old clams, being up to 87.5% of the total. According to the variation in the increment rate of shell fringe new rings largely appear in December. The shell length and shell height as function of the length of shell's fringe (R) can be expressed as:L, = 1.2020R 0.0410; H = 0.7827R 0.1719. The relationship between body weight and body length is W = 0.1491L3.2590. Its growth rate fits in with Logistis natural equationThe inflexion point of the shell length increment curve is at 25.31 month age. The curves of growth and acceleration can reflect the nature of changes in the growing process. The practical estimation of the resources amount at Huangden area agrees basically with the theoretical estimation (about 9.0 thousand ton). The rational catching amount should be 3.5 - 4.0 thousand ton). It is necessary to suggest that minimun legal harvestable age, size and catching season should be 2 years old, 2.76cm in length and from April to August.
%K shellfish
%K clam
%K population dynamics
%K propagation protection<br>贝类
%K 蛤仔
%K 种群动态
%K 繁殖保护
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=193CD41145C209ADD06494C1A222DD66&yid=1833A6AA51F779C1&vid=9CF7A0430CBB2DFD&iid=E158A972A605785F&sid=E42CAFB11D4BE21A&eid=358F98408588E522&journal_id=1000-0933&journal_name=生态学报&referenced_num=1&reference_num=5